Diagnose a GE RX3i backplane fault by checking power rails, slot contacts, rack wiring and controller evidence before replacing the CPU.
Tag Archives: legacy PLC maintenance
27
Jul
Jul
An SLC 5/04 CPU can keep a long-running machine alive for years after the original project team has moved on. When it fails, a replacement CPU must be matched to chassis, memory, DH+ communication, program backup, I/O, firmware, and the machine sequence. A similar Allen-Bradley label is not enough evidence. Konmask readers need a legacy […]